<template>
    <div class="login_container">
        <div class="login_box">
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" class="login_form" :model="loginform" :rules="loginFormRules">
                <!-- 用户名 -->
                <el-form-item prop="username">
                 <el-input prefix-icon='el-icon-user-solid' v-model="loginform.username"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                 <el-input type="password" prefix-icon='el-icon-s-goods' v-model="loginform.password"></el-input>
                </el-form-item>
                <!--按钮区域-->
                <el-form-item class="btns">
                 <el-button type="primary" @click="login">登录</el-button>
                 <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>
<script>
export default {
    name:'Login',
    data(){
        return{
            loginform:{
                username:"admin",
                password:"123456"
            },
            //**这是表单的验证规则对象 */ 
            loginFormRules:{
                username:[
                     { required: true, message: '请输入用户用户名', trigger: 'blur' },
                     { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                password:[
                    { required: true, message: '请输入登录密码', trigger: 'blur' },
                    { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            }
        }
    },
    methods: {

        resetLoginForm(){
           this.$refs.loginFormRef.resetFields();
        },
        login(){
            this.$refs.loginFormRef.validate(async valid=>{
                if(!valid) return;
                const {data:res} = await this.axios.post('login',this.loginform);
                console.log(res)
                if(res.meta.status !== 200){
                    this.$message.error('账号或密码错误');
                }else{
                    this.$message.success('登录成功');
                }
                //登录成功后的token 保存到客户端的sessionStorage中
                //项目中的其他api接口，必须再登陆后才能访问
                
                window.sessionStorage.setItem('token',res.data.token)
                //通过编程式导航跳转到后台主页，路由地址是 /home
                this.$router.push('/home')
            })
        }
    }

}
</script>
<style lang="less" scoped>
.login_container{
    background: #2b4b6b;
    height: 100%;
}
.login_box{
    height:300px;
    width: 450px;
    background-color:#fff;
    border-radius:3px;
    position: absolute;                                     
    left:50%;
    top:50%;
    transform: translate(-50%,-50%);
    .avatar_box{
        width: 130px;
        height: 130px;  
        border: 1px solid #eee;
        border-radius: 50%;
        padding:10px;
        box-shadow:0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        background-color: #fff;
        img{
            width: 100%;
            height: 100%;
            border-radius: 50%;    
            background-color: #eee; 
        }
    }
}
.btns{
    display: flex;
    justify-content: flex-end;
}
.login_form{
    position: absolute;
    bottom:0;
    width:100%;
    padding:0 20px;
    box-sizing: border-box;
}
</style>


